Patents Assigned to Citizen Watch Company, Ltd.
  • Patent number: 6747844
    Abstract: If a floppy disk (200) is inserted into a disk drive unit, a link member (52) rotates due to the movement of the floppy disk (200), and a slide piece (61) recedes from under a projecting piece (131) of an upper head support arm (121). In consequence, the distal end of the upper head support arm (121) descends, so that an upper head which is mounted on the distal end of the upper head support arm approaches a lower head which is mounted on the distal end of a lower head support arm.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: June 8, 2004
    Assignee: Citizen Watch Company, Ltd.
    Inventors: Isao Arai, Yoshiyuki Ohishi, Takuro Kohyama, Shigeru Obata
  • Patent number: 6644875
    Abstract: Before stopper members (25) of a skew correcting mechanism (10) are evacuated from a sheet conveyor path, sheet conveyor roller pairs (8) rotate a set angle in a direction opposite to the sheet feeding direction such that a sheet is separated from the stopper members (25). The sheet conveyor roller pairs (8) are arranged so that at least one of the rollers of each pair is independently pressed against the other with a force corresponding to the type of the sheet.
    Type: Grant
    Filed: December 19, 2000
    Date of Patent: November 11, 2003
    Assignee: Citizen Watch Company, Ltd.
    Inventors: Tsuyoshi Sakaino, Makoto Kawasaki, Yoshiro Kato, Katsuhiko Sato
  • Patent number: 6452741
    Abstract: A frame plate (19) is mounted to the inside of a case (4) of a magnetic recording device. (1), and a disk drive motor and a head body (5) are mounted to the frame plate (19). A member (88) for preventing the deformation of the case is provided between the case (4) and the frame plate (19). The member (88) is placed in a cartridge passing area by the action of a spring in the absence of the cartridge (2), but the member (88) is pressed with the front end of the cartridge (2) when the cartridge (2) is moved forward, the member (88) is forced to retreat to the outside of the cartridge passing area.
    Type: Grant
    Filed: February 15, 2000
    Date of Patent: September 17, 2002
    Assignees: Iomega Corporation, Citizen Watch Company, Ltd.
    Inventors: Katsutoshi Mukaijima, Maki Wakita, Shoji Takahashi
  • Patent number: 6021097
    Abstract: An analog-type electronic watch with an electrical generating apparatus, this watch having a load compensation function means, and completing avoiding the adverse influence of magnetic noise which accompanying electrical generation operation. This watch has an electrical generator which operates intermittently, an electrical generation detection means which detects electrical generation by the electrical generator based on a prescribed relationship to the operation of a drive judging means, and a control means which, when the driving judging means detects electrical generation by the electrical generator, supplies a compensation drive pulse to a drive circuit, regardless of the judgment results of the driving judging means.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: February 1, 2000
    Assignee: Citizen Watch Company, Ltd.
    Inventors: Fumio Kanno, Kenji Miyasaka, Kohichi Satoh, Kiyotaka Igarashi, Haruhiko Higuchi
  • Patent number: 5986311
    Abstract: A gate oxide film is formed on a thin-film SOI substrate or on a single crystalline silicon substrate and a gate is formed on the gate oxide film. The surfaces of a single crystalline silicon at diffusion layer regions on opposite sides of the gate are cleaned and an amorphous silicon film is formed thereon and on the side walls of the gate. Impurity ions are implanted in the amorphous silicon film, which is then converted into recrystallized silicon films by annealing. An interlayer insulator film is formed and another annealing is conducted. As a result, impurity ions in the recrystallized silicon films diffuse into the diffusion layer region of the single crystalline silicon and are activated to form a source and a drain.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: November 16, 1999
    Assignee: Citizen Watch Company, Ltd.
    Inventor: Katsuyoshi Aihara
  • Patent number: 5013169
    Abstract: An improved print head for a dot matrix printer is provided. The printing is performed by wires projecting from said print head. The movement of the wires is controlled by the movement of armatures which contact an armature base. The construction of the base from a liquid crystal polymer or an aromatic series polyester resin results in improved vibration damping which in turn results in quieter printer operation.
    Type: Grant
    Filed: August 16, 1989
    Date of Patent: May 7, 1991
    Assignee: Citizen Watch Company, Ltd.
    Inventors: Tsutomu Ikehata, Makoto Yasunaga, Hirofumi Suzuki
  • Patent number: 4744139
    Abstract: An apparatus for automatically fixing a printed circuit board to a predetermined position on a worktable of an automatic electronic components insertion machine having a non-shiftably arranged reference positioning pin and a shiftable positioning pin which is automatically shifted by an automatic shifting unit, including a numerically controlled rotary drive unit and a feed screw mechanism. The shiftable positioning pin is arranged so as to be always shifted from a predetermined origin position toward or away from the reference positioning pin in response to a change in the size of printed circuit boards to be fed onto the worktable.
    Type: Grant
    Filed: February 14, 1986
    Date of Patent: May 17, 1988
    Assignee: Citizen Watch Company, Ltd.
    Inventors: Keizo Shinano, Yoshinobu Inoue
  • Patent number: 4361410
    Abstract: In a circuit for driving a pulse motor of an electronic timepiece, the initial part or entirety of each drive pulse is modulated to form a group of high frequency pulses thereby reducing an initial surge of current while rotor of motor is still stationary. Modulation can be controlled according to load placed on motor to provide increased drive energy for heavy loading.
    Type: Grant
    Filed: June 11, 1980
    Date of Patent: November 30, 1982
    Assignee: Citizen Watch Company Ltd.
    Inventors: Fumio Nakajima, Takayasu Machida, Kenji Yamada
  • Patent number: 3942287
    Abstract: A contour grinder having a grinding wheel that forms a workpiece into a desired contour by directly controlling the movement of the grinding wheel with a motor operated by numerical control. The grinding wheel has an arched shaped surface on the periphery thereof. The grinder also includes a vertical shaft about which the grinding wheel is rotatable and a support arm which carries a horizontal shaft to which the grinding wheel is fixed. The support arm is rotatably connected to a portion of the vertical shaft and connects the horizontal shaft at a right angle thereto so that the center of the arched surface on the periphery of the grinding wheel is aligned with the center of the vertical shaft. The vertical shaft is rotatable about its axis and movable longitudinally and laterally and the grinding wheel is movable with the vertical shaft.
    Type: Grant
    Filed: October 7, 1974
    Date of Patent: March 9, 1976
    Assignee: Citizen Watch Company, Ltd.
    Inventors: Yoshio Tokunaga, Keizo Shinano
  • Patent number: D267077
    Type: Grant
    Filed: December 5, 1980
    Date of Patent: November 30, 1982
    Assignee: Citizen Watch Company, Ltd.
    Inventor: Harumichi Kabaya
  • Patent number: D295187
    Type: Grant
    Filed: November 18, 1985
    Date of Patent: April 12, 1988
    Assignee: Citizen Watch Company, Ltd.
    Inventor: Nobutoshi Mochizuki